Motion picture and sound record film



A118' 8, 1933- D. H. STEWART 1,921,954 v` v MOTION PICTURE AND'SOUND RECORD FILM Filed March 25, 1929 nnnnnnnn/nnnn" nnnnnnnnunnn `lNvl-:INTOR DONALD H. `STLLIWART ATTORNE? Patented Aug. 8, 11933 lresiste isaiasi Morton aero sonno snoeien Donal@ Stewart, Rochester, EL Y., 'to Eastman Kodak Company, N. EY., a Corporation of New EYorLr Application Marcin .25, @in 2idi?) 9 Claims,

This invention relates to sound photography and more particulariy to an articie and a method useful preventing the objectionable sound eiiects at the ciiange-over from one sound theme 'to anctt er.

in L. e manufacture and use or film 'nearing a sound record, it is irequently necessary to join two unrelated sound. records, for example when tiie m is originally edited or when a part of tce is cot out in the case or' repairing a break in sound record, so that an objectionable, abrupt change in 'tlie reproduced sound takes place.

In secr-lance with 'tiie present invention a :method and material for use in preveni'og succ objectionable sound effect is provided, in its specific form the invention contemplates the use a varyi g density strip or splicing ele-- ment at time jun-cti n ci two sound records.

For a more complete understanding of the invention reference is mafie to the drawing in which Fig. l is a portion of a motion picture nim formed of two sections, each bearing a series of section pic ures together WittL a related sound record: 2 epresents the same strip of film 'with junction oi the two sonno. record portions having a piece oi' volume controlling material applied c represents a similar section with ,e controlli `e'iel etico o lfie two sound records; i enlarged View of the volume control i, shown in -"ig. 2, mounted in sui i ciifi may iff conveniently applied to junction of( :wo sound records; Fig 5 is a similarv enlarged View of the modified Voiume controlling strip shown in Fig. 3; while Fig. -5 snows how the volume controlling materials 'of Figs. i and 5 may loe formed into a roll which may be manufactured and sold as a separate article.

In the production of reels of nlm bearing roofa tion pictures with a related sound record, it is requently necessary in editing such film to ioin 'two sections together where the sound records associated with said sections are not related so that the change in sound at the change-over from one sound record to another at the junctions of two sections is particularly objectionable Furthermore in repairing film bearing sound records in case oi Va break in the sound .recorder a break in the periorations it is necessary to out out a section of the rilraso that the sound record becomes multilated, there is a resulting colectable interruption When the soundl record. is reproduced. Fig. 1 rrepresents two sections or' ilm 10 and 1l joined together or spliced at point l2, in which section lonas a series of pictures 13 snowing one subject and having a related sound record le for producing a sound accompaniment c to these pictures, While section il pictures i5 related to another subi ect matter a reif' sound record ibearing a sound accompaniment appropriate thereto. Since the. sound. accoznpainment on record ifi is not rem iated. to the sound accompaniment on record i6 an objectionable sound ei'ect produced at the 'i2 in passing from the :copreducm tion of one sound record to the ,nce with the-present invention a ing this objectionable ei'ect comprises gradually depressing sound accompaniment on the ac scent the junction point i2 kially increasing the "volume the accompaniment on tile sound record. 'i6 in we movement of the This fry .1:

b element e prov tne voiul loe sound record at siie l2. As in Figs. I2 and oe in form of so-caiierl triangular in shape, cemented .erl over parts ci sound. recnis gradually decreases foin each end until at its centous. codified 'forro of tloe strip 1S is efl to the film and covering a portion .record llLi-ll at each side of the This sound strip, as shown .in en larged :torni in 5, may be rectangular in shape instead of triangular as shown in the two preceding figures. This strip 1S likewise Varies in transparency or optical density from its ends to its -center portion being densest at vtl'le center a? portion which consides with iunction l2. e It essential that the pieces 1"! and i8 should cover only the sound record portion oi the film and overlap any of the picture areas. For this reason the pieces 17 and 18 are mounted on a suitable carrier suolo as a strip of paper 'i9 of such width that when its lower erige 20 registers with the lower edge of the nlm the pieces l and i8 are inprcper position.. Either of the pieces i? and i may 1oe attached to the junction of tide nlm sections by applying a suitable adhesive such as mucilage to the pieces and then placing the densfest portion of the piece so treatllO 19. When the adhesive has dried, the paper 19 is stripped off'and the lm is ready for use.

I consider as included in my invention all other modifications and equivalents as may fall within the scope of the appended claims.

What I claim is: l

1. In the artl of reproduction of soundfrom photographic records, the method of reducing objectionable sound effects at the point of changel over from one accompaniment to another on theA same continuous record which comprises applying to the sound record adjacent the point of change-over a layer which progressively increases the density of the record.

2. In the art pf reproduction of sound from photographic records, the method of reducing objectionable -sound eiiectsV at the point oi change-over from one accompaniment to another on the same continuous record which comprises applying to the sound record at the point of change-over a layer which gradually increases the density of the soundrecord to substantially the point of change-over and thengradually diminishes the density of the record from that l point.

3. In the art of sound photography the method fof reducing the objectionable sound eect at the change-over from one sound record to another which comprises superimposing on a portion of the sound record at each side of the junction point a piece of i'lexible material which gradually increases in optical density up to the changeover point.

4. In theart of reproduction of sound from photographic records, the method of reducing objectionable sound effects from the changeover of one accompaniment to anotheron the same continuous record which comprises ap= Loenen plying to said sound record a layer progressively increasing in Width and progressively increasing in light absorption to substantially the point of change-over.

5. In the art of reproduction of sound from photographic records, the method of reducing objectionable-sound effects from the changeer overlying a portion of each of said sound re- 3. As an article of manufacture a strip carrier, and a plurality of elements adapted to cover a sound record at a splice lying entirely on and temporarily attached to the said carrier by adhesive permitting said elements to be readily stripped therefrom.

9. As an article of manufacture, a carrier, a

plurality of relatively vsmall pieces of material temporarily attached to the carrier, each of said pieces of material having varying light absorb- -ing power and being adapted to be attached to `a sound track lm.

- DONALD H. STEWART. 

